True.

For now, the DNA replication and the synthesis of RNA and proteins using the information stored in DNA are the best understood parts about how a cell grows and divides, but how other complex cellular structures, e.g. membranes or non-ribosomal peptides, are assembled and replicated is much less understood.

We need more years of research, perhaps up to a decade or two, until we will be able to know the entire amount of information describing a simple bacterial cell, and perhaps more than that for a much more complex eukaryotic cell.